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<FONT color="green">001</FONT>    package com.google.code.wicket.auth.component.value.resolver.annotation;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.lang.annotation.Annotation;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.lang.reflect.InvocationTargetException;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.lang.reflect.Method;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.text.MessageFormat;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.util.Collection;<a name="line.7"></a>
<FONT color="green">008</FONT>    import java.util.Collections;<a name="line.8"></a>
<FONT color="green">009</FONT>    import java.util.EnumSet;<a name="line.9"></a>
<FONT color="green">010</FONT>    import java.util.HashSet;<a name="line.10"></a>
<FONT color="green">011</FONT>    <a name="line.11"></a>
<FONT color="green">012</FONT>    /**<a name="line.12"></a>
<FONT color="green">013</FONT>     * An {@link AnnotationValueRetrievalStrategy} that takes multi-value annotation<a name="line.13"></a>
<FONT color="green">014</FONT>     * parameters and returns them as collections of values.<a name="line.14"></a>
<FONT color="green">015</FONT>     * &lt;p&gt;<a name="line.15"></a>
<FONT color="green">016</FONT>     * &lt;code&gt;&lt;pre&gt;<a name="line.16"></a>
<FONT color="green">017</FONT>     * &amp;#64;Retention(RetentionPolicy.RUNTIME)<a name="line.17"></a>
<FONT color="green">018</FONT>     * &amp;#64;Target(ElementType.TYPE)<a name="line.18"></a>
<FONT color="green">019</FONT>     * public &amp;#64;interface MyAnnotation {<a name="line.19"></a>
<FONT color="green">020</FONT>     *     String[] value() default {};<a name="line.20"></a>
<FONT color="green">021</FONT>     * }<a name="line.21"></a>
<FONT color="green">022</FONT>     * <a name="line.22"></a>
<FONT color="green">023</FONT>     * &amp;#64;MyAnnotation("one","two","three")<a name="line.23"></a>
<FONT color="green">024</FONT>     * public class MyClass{<a name="line.24"></a>
<FONT color="green">025</FONT>     *  // ...<a name="line.25"></a>
<FONT color="green">026</FONT>     * }<a name="line.26"></a>
<FONT color="green">027</FONT>     * <a name="line.27"></a>
<FONT color="green">028</FONT>     * {@link AnnotationCache} cache = AnnotationCache.forAnnotationType(MyAnnotation.class);<a name="line.28"></a>
<FONT color="green">029</FONT>     * Collection&lt;String&gt; values =<a name="line.29"></a>
<FONT color="green">030</FONT>     *     MultiAnnotationValueRetrievalStrategy<a name="line.30"></a>
<FONT color="green">031</FONT>     *         .forAnnotation(MyAnnotation.class)<a name="line.31"></a>
<FONT color="green">032</FONT>     *         .retrieveAnnotationValue(cache.getAnnotationForType(MyClass.class));<a name="line.32"></a>
<FONT color="green">033</FONT>     * // values will be a collection of ("one", "two", "three") <a name="line.33"></a>
<FONT color="green">034</FONT>     * &lt;/pre&gt;&lt;/code&gt;<a name="line.34"></a>
<FONT color="green">035</FONT>     * <a name="line.35"></a>
<FONT color="green">036</FONT>     * @param &lt;A&gt;<a name="line.36"></a>
<FONT color="green">037</FONT>     *            the annotation type<a name="line.37"></a>
<FONT color="green">038</FONT>     * @param &lt;T&gt;<a name="line.38"></a>
<FONT color="green">039</FONT>     *            the return type<a name="line.39"></a>
<FONT color="green">040</FONT>     */<a name="line.40"></a>
<FONT color="green">041</FONT>    public class MultiAnnotationValueRetrievalStrategy&lt;A extends Annotation, T&gt;<a name="line.41"></a>
<FONT color="green">042</FONT>            implements AnnotationValueRetrievalStrategy&lt;A, Collection&lt;T&gt;&gt; {<a name="line.42"></a>
<FONT color="green">043</FONT>    <a name="line.43"></a>
<FONT color="green">044</FONT>        /**<a name="line.44"></a>
<FONT color="green">045</FONT>         * Factory method to get a resolver based on the value() method / property<a name="line.45"></a>
<FONT color="green">046</FONT>         * of the specified annotation.<a name="line.46"></a>
<FONT color="green">047</FONT>         * <a name="line.47"></a>
<FONT color="green">048</FONT>         * @param &lt;A&gt;<a name="line.48"></a>
<FONT color="green">049</FONT>         *            annotation type<a name="line.49"></a>
<FONT color="green">050</FONT>         * @param &lt;T&gt;<a name="line.50"></a>
<FONT color="green">051</FONT>         *            return type<a name="line.51"></a>
<FONT color="green">052</FONT>         * @param annotationClass<a name="line.52"></a>
<FONT color="green">053</FONT>         *            the annotation class<a name="line.53"></a>
<FONT color="green">054</FONT>         * @param returnType<a name="line.54"></a>
<FONT color="green">055</FONT>         *            the return type class<a name="line.55"></a>
<FONT color="green">056</FONT>         * @return a resolver based on the annotation<a name="line.56"></a>
<FONT color="green">057</FONT>         */<a name="line.57"></a>
<FONT color="green">058</FONT>        public static &lt;A extends Annotation, T&gt; MultiAnnotationValueRetrievalStrategy&lt;A, T&gt; forAnnotation(<a name="line.58"></a>
<FONT color="green">059</FONT>                final Class&lt;A&gt; annotationClass, final Class&lt;T&gt; returnType) {<a name="line.59"></a>
<FONT color="green">060</FONT>            return new MultiAnnotationValueRetrievalStrategy&lt;A, T&gt;(annotationClass,<a name="line.60"></a>
<FONT color="green">061</FONT>                    returnType);<a name="line.61"></a>
<FONT color="green">062</FONT>        }<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>        /**<a name="line.64"></a>
<FONT color="green">065</FONT>         * Factory method to get a resolver based on the specified method / property<a name="line.65"></a>
<FONT color="green">066</FONT>         * of the specified annotation.<a name="line.66"></a>
<FONT color="green">067</FONT>         * <a name="line.67"></a>
<FONT color="green">068</FONT>         * @param &lt;A&gt;<a name="line.68"></a>
<FONT color="green">069</FONT>         *            annotation type<a name="line.69"></a>
<FONT color="green">070</FONT>         * @param &lt;T&gt;<a name="line.70"></a>
<FONT color="green">071</FONT>         *            return type<a name="line.71"></a>
<FONT color="green">072</FONT>         * @param annotationClass<a name="line.72"></a>
<FONT color="green">073</FONT>         *            the annotation class<a name="line.73"></a>
<FONT color="green">074</FONT>         * @param returnType<a name="line.74"></a>
<FONT color="green">075</FONT>         *            the return type class<a name="line.75"></a>
<FONT color="green">076</FONT>         * @param methodName<a name="line.76"></a>
<FONT color="green">077</FONT>         *            the annotation method / property name to use<a name="line.77"></a>
<FONT color="green">078</FONT>         * @return a resolver based on the annotation<a name="line.78"></a>
<FONT color="green">079</FONT>         */<a name="line.79"></a>
<FONT color="green">080</FONT>        public static &lt;A extends Annotation, T&gt; MultiAnnotationValueRetrievalStrategy&lt;A, T&gt; forAnnotation(<a name="line.80"></a>
<FONT color="green">081</FONT>                final Class&lt;A&gt; annotationClass, final Class&lt;T&gt; returnType,<a name="line.81"></a>
<FONT color="green">082</FONT>                final String methodName) {<a name="line.82"></a>
<FONT color="green">083</FONT>            return new MultiAnnotationValueRetrievalStrategy&lt;A, T&gt;(annotationClass,<a name="line.83"></a>
<FONT color="green">084</FONT>                    returnType, methodName);<a name="line.84"></a>
<FONT color="green">085</FONT>        }<a name="line.85"></a>
<FONT color="green">086</FONT>    <a name="line.86"></a>
<FONT color="green">087</FONT>        private final Class&lt;T&gt; returnType;<a name="line.87"></a>
<FONT color="green">088</FONT>    <a name="line.88"></a>
<FONT color="green">089</FONT>        private Method valueMethod;<a name="line.89"></a>
<FONT color="green">090</FONT>        private boolean isEnum;<a name="line.90"></a>
<FONT color="green">091</FONT>    <a name="line.91"></a>
<FONT color="green">092</FONT>        /**<a name="line.92"></a>
<FONT color="green">093</FONT>         * Protected constructor (use factory method<a name="line.93"></a>
<FONT color="green">094</FONT>         * {@link #forAnnotation(Class, Class)} or write a subclass).<a name="line.94"></a>
<FONT color="green">095</FONT>         * <a name="line.95"></a>
<FONT color="green">096</FONT>         * @param annotationClass<a name="line.96"></a>
<FONT color="green">097</FONT>         * @param returnType<a name="line.97"></a>
<FONT color="green">098</FONT>         */<a name="line.98"></a>
<FONT color="green">099</FONT>        protected MultiAnnotationValueRetrievalStrategy(<a name="line.99"></a>
<FONT color="green">100</FONT>                final Class&lt;A&gt; annotationClass, final Class&lt;T&gt; returnType) {<a name="line.100"></a>
<FONT color="green">101</FONT>            this(annotationClass, returnType, "value");<a name="line.101"></a>
<FONT color="green">102</FONT>        }<a name="line.102"></a>
<FONT color="green">103</FONT>    <a name="line.103"></a>
<FONT color="green">104</FONT>        /**<a name="line.104"></a>
<FONT color="green">105</FONT>         * Protected constructor (use factory method<a name="line.105"></a>
<FONT color="green">106</FONT>         * {@link #forAnnotation(Class, Class, String)} or write a subclass).<a name="line.106"></a>
<FONT color="green">107</FONT>         * <a name="line.107"></a>
<FONT color="green">108</FONT>         * @param annotationClass<a name="line.108"></a>
<FONT color="green">109</FONT>         * @param returnType<a name="line.109"></a>
<FONT color="green">110</FONT>         * @param methodName<a name="line.110"></a>
<FONT color="green">111</FONT>         */<a name="line.111"></a>
<FONT color="green">112</FONT>        protected MultiAnnotationValueRetrievalStrategy(<a name="line.112"></a>
<FONT color="green">113</FONT>                final Class&lt;A&gt; annotationClass, final Class&lt;T&gt; returnType,<a name="line.113"></a>
<FONT color="green">114</FONT>                final String methodName) {<a name="line.114"></a>
<FONT color="green">115</FONT>            this.returnType = returnType;<a name="line.115"></a>
<FONT color="green">116</FONT>            this.isEnum = returnType.isEnum();<a name="line.116"></a>
<FONT color="green">117</FONT>            try {<a name="line.117"></a>
<FONT color="green">118</FONT>                this.valueMethod = annotationClass.getMethod(methodName);<a name="line.118"></a>
<FONT color="green">119</FONT>                final Class&lt;?&gt; returnArrayType = this.valueMethod.getReturnType();<a name="line.119"></a>
<FONT color="green">120</FONT>                if (!returnArrayType.isArray()) {<a name="line.120"></a>
<FONT color="green">121</FONT>                    throw new IllegalArgumentException("Method " + methodName<a name="line.121"></a>
<FONT color="green">122</FONT>                            + " must return an array of " + returnType);<a name="line.122"></a>
<FONT color="green">123</FONT>                } else if (!returnType.isAssignableFrom(returnArrayType<a name="line.123"></a>
<FONT color="green">124</FONT>                        .getComponentType())) {<a name="line.124"></a>
<FONT color="green">125</FONT>                    throw new IllegalArgumentException(<a name="line.125"></a>
<FONT color="green">126</FONT>                            MessageFormat<a name="line.126"></a>
<FONT color="green">127</FONT>                                    .format(<a name="line.127"></a>
<FONT color="green">128</FONT>                                            "Return type {0} is not compatible with requested return type (array of {1})",<a name="line.128"></a>
<FONT color="green">129</FONT>                                            this.valueMethod.getReturnType(),<a name="line.129"></a>
<FONT color="green">130</FONT>                                            returnType));<a name="line.130"></a>
<FONT color="green">131</FONT>                }<a name="line.131"></a>
<FONT color="green">132</FONT>            } catch (final SecurityException e) {<a name="line.132"></a>
<FONT color="green">133</FONT>                throw new IllegalArgumentException(MessageFormat.format(<a name="line.133"></a>
<FONT color="green">134</FONT>                        "Can''t access the ''{1}'' method of {0}", annotationClass,<a name="line.134"></a>
<FONT color="green">135</FONT>                        methodName), e);<a name="line.135"></a>
<FONT color="green">136</FONT>            } catch (final NoSuchMethodException e) {<a name="line.136"></a>
<FONT color="green">137</FONT>                throw new IllegalArgumentException(MessageFormat.format(<a name="line.137"></a>
<FONT color="green">138</FONT>                        "Class {0} doesn''t have a ''{2}'' method: {1}",<a name="line.138"></a>
<FONT color="green">139</FONT>                        annotationClass, annotationClass, methodName), e);<a name="line.139"></a>
<FONT color="green">140</FONT>            }<a name="line.140"></a>
<FONT color="green">141</FONT>        }<a name="line.141"></a>
<FONT color="green">142</FONT>    <a name="line.142"></a>
<FONT color="green">143</FONT>        /**<a name="line.143"></a>
<FONT color="green">144</FONT>         * {@inheritDoc}<a name="line.144"></a>
<FONT color="green">145</FONT>         */<a name="line.145"></a>
<FONT color="green">146</FONT>        @SuppressWarnings("unchecked")<a name="line.146"></a>
<FONT color="green">147</FONT>        @Override<a name="line.147"></a>
<FONT color="green">148</FONT>        public Collection&lt;T&gt; retrieveAnnotationValue(final A annotation) {<a name="line.148"></a>
<FONT color="green">149</FONT>            try {<a name="line.149"></a>
<FONT color="green">150</FONT>    <a name="line.150"></a>
<FONT color="green">151</FONT>                return (annotation == null ? Collections.&lt;T&gt; emptySet() : this<a name="line.151"></a>
<FONT color="green">152</FONT>                        .coll((T[]) this.valueMethod.invoke(annotation)));<a name="line.152"></a>
<FONT color="green">153</FONT>            } catch (final IllegalAccessException e) {<a name="line.153"></a>
<FONT color="green">154</FONT>                throw new IllegalStateException(MessageFormat.format(<a name="line.154"></a>
<FONT color="green">155</FONT>                        "Can''t access property method {0} in annotation {1}",<a name="line.155"></a>
<FONT color="green">156</FONT>                        this.valueMethod, annotation), e);<a name="line.156"></a>
<FONT color="green">157</FONT>            } catch (final InvocationTargetException e) {<a name="line.157"></a>
<FONT color="green">158</FONT>                throw new IllegalStateException(MessageFormat.format(<a name="line.158"></a>
<FONT color="green">159</FONT>                        "Can''t access property method {0} in annotation {1}",<a name="line.159"></a>
<FONT color="green">160</FONT>                        this.valueMethod, annotation), e);<a name="line.160"></a>
<FONT color="green">161</FONT>            }<a name="line.161"></a>
<FONT color="green">162</FONT>        }<a name="line.162"></a>
<FONT color="green">163</FONT>    <a name="line.163"></a>
<FONT color="green">164</FONT>        @SuppressWarnings("unchecked")<a name="line.164"></a>
<FONT color="green">165</FONT>        private Collection&lt;T&gt; coll(final T[] data) {<a name="line.165"></a>
<FONT color="green">166</FONT>            Collection&lt;T&gt; result;<a name="line.166"></a>
<FONT color="green">167</FONT>            if (this.isEnum) {<a name="line.167"></a>
<FONT color="green">168</FONT>                result = EnumSet.noneOf((Class&lt;? extends Enum&gt;) this.returnType);<a name="line.168"></a>
<FONT color="green">169</FONT>            } else {<a name="line.169"></a>
<FONT color="green">170</FONT>                result = new HashSet&lt;T&gt;();<a name="line.170"></a>
<FONT color="green">171</FONT>            }<a name="line.171"></a>
<FONT color="green">172</FONT>            if (data != null) {<a name="line.172"></a>
<FONT color="green">173</FONT>                for (final T item : data) {<a name="line.173"></a>
<FONT color="green">174</FONT>                    result.add(item);<a name="line.174"></a>
<FONT color="green">175</FONT>                }<a name="line.175"></a>
<FONT color="green">176</FONT>            }<a name="line.176"></a>
<FONT color="green">177</FONT>            return result;<a name="line.177"></a>
<FONT color="green">178</FONT>        }<a name="line.178"></a>
<FONT color="green">179</FONT>    }<a name="line.179"></a>




























































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